Adjustable eccentric



Dec. 15, 1925- ADJUSTABLE ECCENTRIC Filed March 22, 1924 5% M1 li VINVENTOR Boris Dubi.

ATTORNEY Patented Dec. 15, 1925.

l t i lit I? BORIS DUBI OF BROOKLYN, NEW YORK.

ADJUSTABLE EGCEN'IRIC.

Application filed March 22, 1924.

To all 10710722. it may concern:

Be it known that I, BORIS Deni, a citizen of the United States, and resident of the borough of Brooklyn, city of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in an Adjustable Eccentric, of which the following is a specification.

This invention relates to an adjustable eccentric. Its object is the production of an eccentric wherein the throw thereof can be easily varied. A- second object of the invention is the production of an adjustable eccentric in which the throw can be varied from its minimum to its maximum amount, by the slightest increments of change in the amount of the throw. A third object of the invention is the production of an adjustable eccentric wherein the adjustable portions thereof can be clamped in position.

The organizmtion of the invention in this instance comprises three eccentrics disposed one over the other. The innermost eccentric is rotatably supported on a shaft or sleeve, the second eccentric is rotatably supported on the innermost eccentric, and the outermost eccentric is supported on the second eccentric and means are provided to maintain the outermost eccentric in the same angular position with respect to said shaft.

Referring to the accompanying drawings,

Fig. 1 represents a sectional view of an exemplificati on of the adjustable eccentric as on the line 1, 1 of Fig. 2; Fig. 2 shows a section of Fig. 1 on the line 2, 2; Fig. 3 indicates a sectional view similar to Fig. 1 on the line 3, 3 of Fig. 4; of the eccentric with the elements in a different position; Fig. 4 shows a section of Fig. 3 on the line 4, 4; Fig. 5 shows a sectional view similar to Fig. 1 on the line 5, 5 of Fig. 6, with the elements again changed in position; 6 is a section of Fig. 5 on the line 6, (i; Fig. 7 represents a section similar to Fig. 1 on the line 7 7 of Fig. 8 with the elements again changed in position and Fig. 8 shows a section of Fig. 7 on the line 8, 8.

Referring to the drawings a sleeve 15 has extending therefrom the guide pin 16, which is provided with an axial threaded opening for the clamping screw 17 having the head 18. An adjustable supplemental eccentric 22 is rotably supported on the sleeve 15 and has formed therein the elongated guide opening 23 through which the said pin 16 extends. An adjusting wing 25 preferably Serial No. 701,099.

knurled at its outer end 26 extends from the supplemental adjustable eccentric 22. A second supplemental. adjustable eccentric 30 is rotatably supported on the adjustable supplemental eccentric 22 and has formed. therein the elongated guide opening 31, through which the said pin 16 extends. An adjusting wing 35 preferably knurled on its outer end 36 extends from the supplemental adjustable eccentric 30.

An outer eccentric 40 is rotatably supported on the supplemental adjustable eccentric 30 and has formed therein the cylindrical guide opening 41 for the guide pin 16. An annular flange 1-2 extends from the eccentric 40 and is coaxial with the opening 41. A sh aft 14 supports the sleeve 15.

To vary the throw of the outer eccentric 4-0 the supplemental adjustable eccentrics 22 and 30 are located in different relative positions, by means of the adjusting wings 25 and 35. In Figs. 1 and 2 the supplemental adjustable eccentrics 22 and 30 are positioned to impart the maximum throw to the outer eccentric 40. In the other figures of the series, the supplemental adjustable eccentrics are located to gradually decrease the throw of the outer eccentric 40 and in Figs. 7 and 8 the supplemental adjustable eccentrics are positioned to produce the minimum throw for the outer eccentric 40.

It will be noted that in Figs. 1 and 2 the large body portion of each eccentric is on the same side of the axial center of the sleeve 15 and the locations of the large body portions of the supplemental adjustable eccentrics 22 and 30 gradually take positions reversed from the positions in said. Figs. 1 and 2 and in Figs. 7 and 8 are completely reversed from their original position. After the supplemental adjustable eccentrics are located in position they are so maintained by means of the screw 17 The head 18 of said screw bears on the flange 42 of the outer eccentric and draws the supplemental eccentrics to said outer eccentric to clamp them all in operative position.

It will be noted that when the supplemental adjustable eccentrics 22 and 30 are being adjusted to different positions that they are guided. by the coaction of the uide pin 16 and their elongated openings. The outer eccentric 40 is always maintained in the same angular position with respect to the sleeve 15, by the coaction of the guide pin 16 and the cylindrical guide opening, 4-1, which latter is only slightly greater in diameter than the pin 16.

It will be noted that the outer eccentric i0 and the supplemental adjustable eccentrics 22 and 30 in all of their positions are in contact and practically produce a continuous structure, which avoids rattling of its parts and produces an adjustable eccentric suitable for continuous hard service.

Various modifications may be made in the invention and the present exemplification is to be taken as illustrative and not limitative thereof.

Having described my invention what I desire to secure by Letters Patent and claim is:

1. In an adjustable eccentric the combination of an outereccentric, a pair of supplemental adjustable eccentries rotatably coacting with the outer eccentric and means to locate the supplemental adjustable ec centrics in different positions.

2. In an adjustable eccentric the combination of an outer eccentric, a pair of supplemental adjustable eccentrics rotatably coactingwith the outer eccentric, means to locate the supplemental eccentrics in different positions and means to clamp the eccentrics together.

3. In adjustable eccentric the combination of a shaft, an adjustable eccentric rotatably supported on the shaft, a second adj ustable eccentric rotatably supported on the first eccentric, an outer eccentric supported on the second eccentric, a pin extending from the shaft and extending through all the eccentrics and means to clamp the eccentrics together.

In an adjustable eccentric the combination of a shaft, an eccentric with an clongjated opening rotatably supported on the shaft. a second eccentric with an elongated opening rotatably supported on the first eccentric, an outer eccentric having a guide opening supported on said second eccentric and a pin with one end fastened to said shaft extending through the said elongated openings and the opening of the outer eccentric, said pin maintaining the outer eccentric in the same angular position with respect to said shaft with various positions of the other eccentrics and means coacting with said pin to clamp the eccentrics together.

Signed at the borough of Manhattan, city of New York in the county of New York and State of New York this 20th day of March A. D. 1924;.

BORIS DUBI. 

